10%
200 x x%=20
x=10%
Do u understand ?
Step-by-step explanation:
Given:
and 
We can solve for f(x) by writing

Let 

Then


We know that f(0) = 0 so we can find the value for k:

Therefore,

Answer:
B) The scale on the y-axis could be changed to 25–40.
Plug in -1 for x the solve the equation. 3 * -1 -4(-1) which equals 7